div#mission{
  background: url('/assets/images/Servesellmethod\(7\).png') no-repeat center center;
  background-size: cover;
}

section#book{
  background: url('/assets/images/Servesellmethod\(12\).png') no-repeat;
  background-size: contain;
}

section#impact{
  background: url('/assets/images/Servesellmethod\(13\).png') no-repeat;
  background-size: contain;
  background-position: bottom;
}